Feeling cramped in his mere 34,000-square-foot studio in Sunset Park, Brooklyn, Slonem rented a 150,000-square-foot armory in Scranton, down the street from the Woolworth property. “I saw this house and my jaw just dropped,” Slonem told Page Six.

Later, the dilapidated home went on the market for $295,000, and he jumped.

Slonem says the Beaux Arts mansion is “a very significant building of the period, but needs a lot of work.” He hopes renovations will be “pretty far along” within a year — “I’m already picking out chandeliers and sconces.”

Slonem owns several other historic properties, but says of this 8,000-square-footer that he’ll use as a private abode, “My other homes are older. It’s a little jewel.”

Fatefully, Woolworth’s first opened its doors in 1879 on Slonem’s birthday, July 18. He recently launched an exhibition in Moscow, where he received the Russian Academy of Art Medal of Merit.